{"type": "FeatureCollection", "features": [{"id": "10.1016/j.agsy.2004.09.005", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-20T16:15:06Z", "type": "Journal Article", "created": "2004-12-13", "title": "On Farm Testing Of Integrated Nutrient Management Strategies In Eastern Uganda", "description": "Abstract   This paper reports on a Participatory Learning and Action Research (PLAR) process that was initiated in three villages in eastern Uganda in September 1999 to enable small-scale farmers to reverse nutrient depletion of their soils profitably by increasing their capacity to develop, adapt and use integrated natural resource management strategies. The PLAR process was also used to improve the participatory skills and tools of research and extension personnel to support this process. The farming systems of the area were characterised for socio-economic and biophysical conditions that included social organisations, wealth categories, gender, crop, soil, agro forestry and livestock production. Farmers identified soil fertility constraints, their indicators, and causes of soil fertility decline, and suggested strategies to address the problem of soil fertility decline. Soil fertility management diversity among households indicated that most farmers were not carrying out any improved soil fertility management practices, despite previous research and dissemination in the area. Following the diagnosis stage and exposure visits to other farmer groups working on integrated soil fertility projects, the farmers designed 11 experiments for on-farm testing. One hundred and twenty farmers then chose, for participatory technology development, sub-sets of these 11 experiments, based on the major agricultural constraints and the potential solutions identified and prioritised by the farmers. Quantitative and qualitative results from the testing, farmer evaluation and adaptation, training, dissemination strategies and socio-economic implications of these technologies are discussed.", "keywords": ["2. Zero hunger", "soil chemicophysical properties", "soil fertility", "yields", "1. No poverty", "fertilizer application", "esti\u00e9rcol", "04 agricultural and veterinary sciences", "fertilidad del suelo", "15. Life on land", "01 natural sciences", "tillage", "propiedades f\u00edsico - qu\u00edmicas suelo", "gender", "manejo del suelo", "0401 agriculture", " forestry", " and fisheries", "farmyard manure", "green manures", "abonos verdes", "soil management", "aplicaci\u00f3n de abonos", "rendimiento", "on-farm research", "investigaci\u00f3n en la finca", "0105 earth and related environmental sciences"], "contacts": [{"organization": "Esilaba, Anthony O., Byalebeka, J.B., Delve, Robert J., Okalebo, JR, Ssenyange, D, Mbalule, M, Ssali, H.,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1016/j.agsy.2004.09.005"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Agricultural%20Systems", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.agsy.2004.09.005", "name": "item", "description": "10.1016/j.agsy.2004.09.005", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.agsy.2004.09.005"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2005-11-01T00:00:00Z"}}, {"id": "10.1007/s11104-005-0194-2", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-20T16:14:40Z", "type": "Journal Article", "created": "2012-03-12", "title": "Long-Term Integrated Soil Fertility Management In South-Western Nigeria: Crop Performance And Impact On The Soil Fertility Status", "description": "Crop response, tree biomass production and changes in soil fertility characteristics were monitored in a long-term (1986\u20132006) alley-cropping trial in Ibadan, Nigeria. The systems included two alley cropping systems with Leucaena leucocephala and Senna siamea on the one hand and a control (no-trees) system on the other hand, all cropped annually with a maize- cowpea rotation. All systems had a plus and minus fertilizer treatment. Over the years, the annual biomass return through tree prunings declined steadily, but more drastically for Leucaena than for Senna. In 2002, the nitrogen contribution from Leucaena residues stabilized at about 200 kg N/ha/year, while the corresponding value for Senna was about 160 kg N/ha/year. On average, the four Leucaena prunings were more equal in biomass as well as in amounts of N, P and cations, while the first Senna pruning was always contributing up to 60% of the annual biomass or nutrient return. Maize crop yields declined steadily in all treatments, but the least so in the Senna + fertilizer treatment where in 2002 still 2.2 t/ha of maize were obtained. Nitrogen fertilizer use efficiency was usually higher in the Senna treatment compared to the control or the Leucaena treatment. Added benefits due to the combined use of fertilizer N and organic matter additions were observed only for the Senna treatment and only in the last 6 years. At all other times, they remained absent or were even negative in the Leucaena treatments for the first 3 years. Most chemical soil fertility parameters decreased in all the treatments, but less so in the alley cropping systems. The presence of trees had a positive effect on remaining carbon stocks, while they were reduced compared to the 1986 data. Trees had a positive effect on the maintenance of exchangeable cations in the top soil. Exchangeable Ca, Mg and K \u2013 and hence ECEC \u2013 were only slightly reduced after 16 years of cropping in the tree-based systems, and even increased in the Senna treatments. In the control treatments, values for all these parameters reduced to 50% or less of the original values after 20 years. All the above points to the Senna-based alley system with fertilizers as the more resilient one. This is reflected in all soil fertility parameters, in added benefits due to the combined use of fertilizer nitrogen and organic residue application and in a more stable maize yield over the years, averaging 2.8 t/ha with maximal deviations from the average not exceeding 21%.", "keywords": ["alley cropping", "0106 biological sciences", "added benefits", "fertilizers", "senna siamea", "yields", "dry matter content", "fertilidad del suelo", "maize", "01 natural sciences", "nitrogen use efficiency", "cowpeas", "ma\u00edz", "zea mays", "vigna unguiculata", "propiedades f\u00edsico - qu\u00edmicas suelo", "aplicaci\u00f3n de abonos", "hedgerow", "fijaci\u00f3n del nitr\u00f3geno", "2. Zero hunger", "biomass", "caup\u00ed", "soil chemicophysical properties", "nutrient", "soil fertility", "fertilizer application", "04 agricultural and veterinary sciences", "15. Life on land", "6. Clean water", "biomasa", "leucaena leucocephala", "nitrogen fixation", "cultivo entre l\u00edneas", "0401 agriculture", " forestry", " and fisheries", "rendimiento", "contenido de materia seca"]}, "links": [{"href": "http://ciat-library.ciat.cgiar.org/Articulos_Ciat/D2-PDF.pdf"}, {"href": "https://doi.org/10.1007/s11104-005-0194-2"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Plant%20and%20Soil", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s11104-005-0194-2", "name": "item", "description": "10.1007/s11104-005-0194-2", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s11104-005-0194-2"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2005-06-01T00:00:00Z"}}, {"id": "10.1023/a:1010310300067", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-20T16:16:37Z", "type": "Journal Article", "created": "2002-12-23", "description": "Planted tree or shrub fallows can help increase the fertility of degraded tropical soils. We investigated the effects of planted fallows of Indigofera (IND), Calliandra (CAL), and Tithonia (TTH); a natural, unmanaged fallow (NAT); and a maize/bean rotation (ROT) on the dynamics and partitioning of soil organic matter (SOM) and phosphorus (P). One year after treatment, samples were collected from a fine-textured volcanic-ash soil (Oxic Dystropept) of a mid-altitude hillside in southwestern Colombia. The SOM in the sand-size fraction (150\u20132000 \u03bcm) was subdivided into light (LL), intermediate (LM), and heavy (LH) fractions. Total soil P was also fractionated into inorganic (Pi) and organic (Po). Of the planted fallows, TTH most increased and NAT least increased plant-available Pi and Po. The amounts of C, N, and P in the LL and LM fractions of SOM followed the order, TTH>CAL>NAT>ROT>IND and CAL>TTH>IND>NAT>ROT, respectively. Total amounts of N, P, K, Ca, and Mg in the soil were significantly (P < 0.05) highest under TTH and lowest under NAT. The fallow and ROT systems did not affect the C/N, C/P, and N/P ratios in the soil but significantly did so in the LL and LM fractions of SOM. Significant correlations indicated that the P content in the LL and LM fractions of SOM may help determine the amounts of NaHCO3-extractable Pi and Po, which may therefore serve as sensitive indicators of `readily available' and `readily mineralizable' soil P pools, respectively, in the volcanic-ash soils of the Andes.", "keywords": ["2. Zero hunger", "rotaci\u00f3n de cultivos", "soil chemicophysical properties", "soil fertility", "materia org\u00e1nica del suelo", "calliandra calothyrsus", "04 agricultural and veterinary sciences", "rotational cropping", "fertilidad del suelo", "15. Life on land", "fallow systems", "indigofera constricta", "sistemas con barbecho", "soil organic matter", "tithonia diversifolia", "propiedades f\u00edsico - qu\u00edmicas suelo", "0401 agriculture", " forestry", " and fisheries", "phosphorus"]}, "links": [{"href": "https://doi.org/10.1023/a:1010310300067"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Plant%20and%20Soil", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1023/a:1010310300067", "name": "item", "description": "10.1023/a:1010310300067", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1023/a:1010310300067"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2001-04-01T00:00:00Z"}}, {"id": "10.1071/sr15074", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-20T16:17:02Z", "type": "Journal Article", "created": "2016-07-03", "title": "Impact Of Reduced Tillage And Crop Residue Management On Soil Properties And Crop Yields In A Long-Term Trial In Western Kenya", "description": "<p>  Sustainable farming practices are required to address the persistent problems of land degradation and declining crop productivity in Sub-Saharan Africa. Approaches such as reducing tillage and retaining crop residues as mulch are potential entry points for smallholder farmers to move towards sustainability. In this study, we assessed the impact of reduced tillage (RT) compared with conventional tillage (CT), each combined with crop residue reapplication, on soil quality indicators and crop yields under an 8-year trial in western Kenya. Our results indicate that RT combined with crop residue reapplication enhanced soil physical quality through increased macroaggregate (&gt;2000\uffc2\uffb5m) proportions and mean weight diameter. Similarly, lower respiratory quotient values indicate that soil microbes under RT have better substrate-use efficiency than those under CT. Nevertheless, soil organic carbon (C), potentially mineralisable C, microbial biomass C and mineral nitrogen contents were all higher under CT with crop residue incorporated into the soil. Maize grain yield and aboveground biomass were also higher under CT. Thus, despite RT showing potential to improve soil physical properties, CT performed better. A stepwise approach is proposed towards the practice of conservation agriculture under resource-constrained smallholder farming conditions, starting with increased biomass production to provide crop residue for soil cover, followed by RT approaches. </p>", "keywords": ["labranza de conservaci\u00f3n", "2. Zero hunger", "soil chemicophysical properties", "soil fertility", "04 agricultural and veterinary sciences", "crop yield", "fertilidad del suelo", "15. Life on land", "smallholders", "12. Responsible consumption", "sistemas de explotaci\u00f3n", "nutrient management", "13. Climate action", "propiedades f\u00edsico - qu\u00edmicas suelo", "conservation tillage", "0401 agriculture", " forestry", " and fisheries", "farming systems", "rendimiento de cultivos"]}, "links": [{"href": "https://doi.org/10.1071/sr15074"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Soil%20Research", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1071/sr15074", "name": "item", "description": "10.1071/sr15074", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1071/sr15074"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2016-01-01T00:00:00Z"}}, {"id": "10.5424/sjar/2006044-212", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-20T16:21:05Z", "type": "Journal Article", "created": "2013-11-21", "description": "<p>Soil degradation is the result of interactions involving the soil itself, human activity, climate, relief, and vegetation. These can lead to changes in &#151;or even the loss of&#151; certain characteristics of the soil, reducing its present and future productive capacity. The aim of this study was to determine the behaviour of a number of soil physical variables and total organic carbon content, as well as the root activity and yield of crops grown in rotation (soybean in 1998/1999 and maize in 1999/2000) under direct sowing (DS) and conventional tillage (CT) conditions. Root activity was assessed using an isotopic methodology involving the uptake of 32P. The root activity of the soybean crop, which grew under normal rainfall conditions, was greater under CT conditions. That of the maize crop, which grew when rainfall was well below normal, was greater under DS conditions. Bulk density was higher and total porosity lower in the upper 0.10 m of the soil in the DS plots. Conventional tillage led to lower penetration resistance values in the upper layers of the soil profile. No differences in soil total organic carbon were found between the two tillage systems. The soil water content of the upper soil layers was higher under DS. The yield of the soybean crop under CT was 57% higher than under DS. The yield of maize was affected by water deficiency; higher yields were obtained with DS than with CT.</p>", "keywords": ["Glycine max", "Argentina", "Rendimiento de cultivos", "Soil fertility", "Zea mays", "Tracer techniques", "Glycine max; Zea mays; Crop rotation; Conventional tillage; Zero tillage; Soil chemicophysical properties; Soil fertility; Tracer techniques; Crop yield; Argentina", "Glycine max; Zea mays; Rotaci\u00f3n de cultivos; Labranza convencional; Cero-labranza; Propiedades f\u00edsico - qu\u00edmicas suelo; Fertilidad del suelo; T\u00e9cnicas de trazadores; Rendimiento de cultivos; Argentina", "Crop rotation", "Labranza convencional", "Crop yield", "Fertilidad del suelo", "2. Zero hunger", "Conventional tillage", "Soil chemicophysical properties", "0402 animal and dairy science", "04 agricultural and veterinary sciences", "15. Life on land", "T\u00e9cnicas de trazadores", "6. Clean water", "Propiedades f\u00edsico - qu\u00edmicas suelo", "Zero tillage", "0401 agriculture", " forestry", " and fisheries", "Rotaci\u00f3n de cultivos", "AGRICULTURAL ENGINEERING", "Cero-labranza"], "contacts": [{"organization": "Barrios, M.B., Bozzo, A.A., Debelis, S.P., Pereyra, A.M., Buj\u00e1n, A.,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5424/sjar/2006044-212"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Spanish%20Journal%20of%20Agricultural%20Research", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.5424/sjar/2006044-212", "name": "item", "description": "10.5424/sjar/2006044-212", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5424/sjar/2006044-212"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2006-12-01T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Propiedades+f%C3%ADsico+-+qu%C3%ADmicas+suelo&f=json", "hreflang": "en-US"}, {"rel": "alternate", "type": "text/html", "title": "This document as HTML", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Propiedades+f%C3%ADsico+-+qu%C3%ADmicas+suelo&f=html", "hreflang": "en-US"}, {"rel": "collection", "type": "application/json", "title": "Collection URL", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main", "hreflang": "en-US"}, {"type": "application/geo+json", "rel": "first", "title": "items (first)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Propiedades+f%C3%ADsico+-+qu%C3%ADmicas+suelo&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Propiedades+f%C3%ADsico+-+qu%C3%ADmicas+suelo&offset=5", "hreflang": "en-US"}], "numberMatched": 5, "numberReturned": 5, "distributedFeatures": [], "timeStamp": "2026-09-21T00:57:48.115639Z"}